1. Corn is grown primarily for the production of grain.
2. There is a great number of corn varieties differing in certain characteristics.
3. The main aim of cultivating corn is to conserve moisture in the soil and to aerate it.
4. Cool water accompanied by high precipitation is known to be favorable for the production of corn grain.
5. Corn is usually planted to the depth of 1 to 1 1/2 inches, if the soil is rather cold.
6. Corn doesn’t need much moisture, as a relatively small amount of water is required to produce one pound of dry matter of this plant.
7. Soils having high water-holding capacityare believed to be best for corn.
8. When fed to livestock, corn is usually produced on the same farm.
9. The depth of planting corn is uniform for all soils.
10. At the beginning of the growing season water requirements of corn of the highest.
6 . Read text B without a dictionary and title it.
Text 17 В
As with most cultivated crops plowing is usually the first step in seedbed preparation for corn. Corn having a more extensive and deeper rooting system than the other cereals, deeper plowing and cultivation are required, both fall and spring plowing practiced in growing corn. The final preparation of the plowed land usually consists in pulverization of the top 4 inches of the soil. This should be done immediately before the crop is planted in order to control weeds. Soil fertility is more important in growing corn then in growing any of the other cereals. Soils very rich in available nitrogen will cause lodging of the small grains, but they are desirable for corn. For these reasons, such practices as applying barnyard manure and using commercial fertilizers and the time of planting and later as a side dressing are all used to provide the fertility needed for good growth of corn. But one should remember that germination is much retarded (замедлять) by fertilizers coming in contact with the seed. In order to maintain high yields corn is usually grown in rotation with other crops. Corn rotations usually include a small grain, and a legume or a legume-grass mixture. As a rule, corn follows or a legume-grass mixture.
7. Paragpaph the text and render the main idea of each paragraph in Russian or in English.
8 . Make a summry of text B in English.
Listening and speaking Focus
Watch the video then
a) answer the questions below:
1. How corn conquered the world
1. How did this single variety of this single plant become the biggest success story in agricultural history of USA?
1. What is another name for corn?
2. What was the corn first domesticated from?
3. What fact has made the corn production a global phenomenon?
b) make a summary of the video.
https://www.ted.com/talks/chris_a_kniesly_how_corn_conquered_the_world
9 Discussion. What are the disadvantages of corn production?
UNIT 18. POTATOES
| In this unit you will learn: | Grammar focus: - Усилительная конструкция It is … that (who). - Предложения типа It is necessary that ... . - Word meaning it (revision). - Word meaning that (revision). Vocabulary focus Reading and comprehension focus: - Text A. Potatoes. - Text B. Growing Potatoes. Listening and speaking focus |
Grammar Focus
| Схема использования конструкции: It + is/was +главное действующее лицо + who/that + другие члены предложения |